Seiko Cal. 4478 - 347

The Seiko 4478-347 represents an important milestone in Seiko's 1978 lineup. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-fba17c8ce1dd]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

15.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Green

Jewels

21j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1978

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